Air-brake.



' No. 689,576" Patented Dec. 24, mm.

a. L. COLLEDGE.

AIRBBAKE.

(Application filed May 24, 1901.) 7 (No Modej'.)

UNITED STATES PATENT 'OFFICE.

GEORGE 1 CoLLEneEfor CANTON, 01110, ASSIGNOR or ONE-HALF -'ro CHARLES A.VAN DUSEN, on CANTON, 01110.

AIR-BRAKE.

'SPEGIFICATION forming part of Letters Patent No. 689,576, datedDecember 24, 1901.

Applieatipn filed May 24,1901.

To all 1071,0171 it nuty' 00756076215" Beit known that I, GEORGE LECOLLEDGE, a citi z en of the United States,'residing at Oanton, in'thecounty of Stark and State of Ohio, have invented certain new and usefulImprovements in Air-Brakes; and I do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the annexed drawing, making a part of this specification, and to thefigures of reference marked thereon, in which the drawing illustrates asectional view showing the difierent parts properly arranged ands'truction hereinafter described.

' used or one substantially like it.

illustrating my improvement. The present invention has relation toairbrakes; and it consists in the peculiancon- The object and. purposeof the present invention is to provide means by which the auxiliaryreservoirs can be recharged simultaneously with the train line. Thisobject is brought aboutby the construction hereinafter described.

In the accompanying drawing, 1 represents the train-line connect-ion,which is provided with the ordinary screen 2, which is connected in theordinary manner. The chamber 3 is of the ordinary construction and formsno particular part of the present invention, except that such a chambermust necessarily be From the chamber 3 leads the main passage 4 to thechamber 5, said chamber 5 being provided with the port or ports 6. Inthe drawing I have illustrated two ports; but it will be understood thatthe number may be increased or decreased without departing from thenature of my invention, as the only object of the port 6 is to provide ameans for allowing air to enter the triple-valve-piston chamber 7, saidair when forced into the chamber 7 bringing the piston S to releaseposition shown in the drawing.

The parts above referred to are those of common construction and form noparticular part of the present invention except as they are used with myimproved construction.

From the chamber 7 leads the recharge-port 9, which recharge-port leadsand communicates with the chamber 10, and when pres- Serial No. 61,677.(No model.)

sure is brought to bear against the piston 11 it is driven against theequalizing-spring 12, which spring is located around the stem 13,

.which stem extends upon either side of the piston 11,asillustrated inthe drawing. When the piston 11 is driven away from the recharge-port 9,it carries with it the stem' 13,

at which time the port 11 is opened by reav therebyfilling the auxiliaryreservoir. At the same time air passes from the slide-valve chamber 17through port 18 into chamber l9, thereby equalizing the pressure inchambers 19 and 10 and train-line and auxiliary reservoir, and when thepressure is equal in all of the above-mentioned chambers and train-linethe spring 12 forces the piston 11 toward the recharge-port 9, therebyclosing the port 14.

WVhen a train-line reduction is made to apply the brakes, thehtake-valve piston 8 moves against the graduating-stem 20, therebyclosing the recharge-port 9, making the piston 11 inoperative until thebrakes are again released, which moves the piston 8 back to the positionillustrated in the drawing.

Heretofore the periphery of the chamber 7 was provided with very smallfeeding-ports,

and they must under the old construction be small, owing to the fact theair would escape; but by my peculiar arrangement I do away with thefeed-ports located in the periphery of the chamber 7 and provide onerechargeport 9, thereby allowing a rapid recharge.

Heretofore and with the old feed-ports it was impossible to rechargeauxiliary reservoirs to their full capacity (which is about seventypoiiuds) in' much less than two minutes; but with my peculiararrangement and by the increased size ofthe recharge-ports 9, 14, and 16Lam enabled to recharge after a reduction hasheen made as fast astrainline can be recharged fromthe main reservoir, which is almostinstantaneously-As, in

fact, instantaneously for all practical pur poses.

It will be understood that my improved detoo ' vice can be connectedditferent from the exact construction shown and the same objectaccomplished-as, for instance, in the drawpose of holding the spring 12and also act as,

a guide for the stem 13.

It will be understood that the different parts of the air-brake properare constructed in the ordinary manner, reference being bad toconnecting my improvement thereto, said parts being shown only for thepurpose of illustilting my application and need no description here. 1

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is' v 1. In an air-brake the combination of acylinder or chamber having. located therein a brake-valve piston, arecharge-port leading from said cylinder or chamber into andcommunicating with a chamber having located therein a piston, saidpiston forming a division in said chamber and fixed to a stem, a portcontrolled by the piston-stem and a-port leading from the chamber havingthe port controlled by the piston-stein into the slidingvalve chamber 17and a'spring located around the piston-stem upon the opposite side ofthe piston from thatcoutrolling the port, substanstantiallyas and forthe purpose specified.

2. In an air-brake the combination of a brake-operating piston locatedin a cylinder, a cylinder spaced from the cylinder containing thebrakeoperating piston, and having located in said cylinder a piston,said piston forming a partition in the chamber in which it is located, arecharge-port located between the brake-operating-piston cylinder andthe spaced chamber, ports located upon opposite sides ofpartition-piston and leading to the slide-valve chamber, thepartition-piston provided with stems upon its sides, and one of theports controlled by one of the piston- .stems, substantially as and for.the purpose set forth.

3. In an air-brake, a brake-piston located in a cylinder, arecharge-port leading from said cylinder to an ainchamberhavinglocatedtherein a piston, said piston forming a partition for the chamber inwhich it is located, and ports leading from said air-cham her to theslide-valve chamber upon opposite sides of the piston, one of said portscontrolled by the stem of the piston, substantially as and for thepurpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

GEORGE L. COLLEDGE.

Witnesses:

DAN. W. SHETTER, i W. BOND.

